Does Federal Student Aid Drive Up College Tuition? What the Data Shows

In higher education policy debates, few concepts have remained as durable as the "Bennett Hypothesis." First proposed in 1987 by then-Secretary of Education William J. Bennett in a New York Times op-ed titled "Our Greedy Colleges," the theory posits that increases in federal financial aid—specifically student loans and grants—simply allow institutions to raise tuition prices, capturing the government subsidy for themselves and leaving students with the same out-of-pocket costs [6].

As policymakers in 2026 debate the future of student loan programs, interest rate caps, and institutional accountability, the validity of this hypothesis remains a critical question. To assess whether federal aid is indeed the primary driver of the nation's skyrocketing college costs, economists have increasingly turned to microdata to isolate the causal effects of federal aid from other complex pressures, such as state budget cuts and rising institutional expenditures.

Where the Hypothesis Holds: Private and For-Profit Colleges

Empirical evidence demonstrates that the Bennett Hypothesis is not merely a theoretical construct; it is a measurable reality in specific sectors of the higher education market. The most authoritative support for the hypothesis comes from a landmark study published in The Review of Financial Studies by researchers at the Federal Reserve Bank of New York [1].

To establish causality, the researchers analyzed student-level financial data and tracked how universities adjusted their tuition prices in response to legislative changes in federal student loan caps between 2001 and 2011. The study found a substantial "pass-through" effect: for every dollar increase in subsidized federal loan limits, tuition at eligible institutions rose by approximately 60 cents [1]. Unsubsidized federal loans also showed a positive, though smaller, pass-through effect of approximately 20 cents on the dollar, while Pell Grants had an estimated pass-through rate of nearly 40 cents [1].

This pricing behavior was highly concentrated in private, non-selective, and moderately selective universities, as well as for-profit colleges. In these sectors, institutions possess significant pricing power and cater to students who rely heavily on debt to finance their degrees. Because the expansion of loan caps increases the total pool of credit available to these students, universities are able to raise prices and absorb the subsidy without experiencing a drop in enrollment.

The pricing behavior is even more pronounced in the private for-profit sector. A study published in the American Economic Journal: Economic Policy by Stephanie Riegg Cellini and Claudia Goldin compared tuition at for-profit colleges that were eligible for federal Title IV financial aid with tuition at similar for-profit colleges that did not participate in federal programs [2].

The researchers found that Title IV-eligible institutions charged tuition that was, on average, 78% higher than their non-eligible peer institutions for comparable certificate programs. The dollar amount of this premium was roughly equal to the average student aid package received by students at eligible schools, suggesting that these institutions captured nearly 100% of the federal subsidy [2].

The Public Sector: A Story of State Disinvestment

While the Bennett Hypothesis provides a compelling explanation for tuition inflation in private and for-profit markets, it fails to explain tuition trends in public higher education. This distinction is critical: according to the National Center for Education Statistics (NCES), public institutions enroll approximately 77% of all undergraduate students in the United States [5].

For public four-year and two-year colleges, tuition increases are driven primarily by shifts in state funding, rather than federal aid expansions. Higher education is often described as the "balance wheel" of state budgets [4]. Unlike the federal government, states are legally required to maintain balanced budgets. During economic downturns, state legislatures frequently cut funding for public universities because higher education is one of the few discretionary budget items capable of generating its own revenue through tuition hikes.

According to the State Higher Education Executive Officers Association (SHEEO), this dynamic has fundamentally restructured how public higher education is funded. While total state and local appropriations reached a record $130.7 billion in fiscal year 2025, public enrollment surges outpaced this funding growth. As a result, public higher education funding per student declined by 1.0% nationwide in FY 2025 (from $12,205 to $12,082) [3]. This represents the first decline in per-student funding since 2012, highlighting the ongoing volatility of state support.

In the public sector, the "student share"—the proportion of total revenue covered by tuition fees—has risen dramatically since the late 1980s. At public four-year institutions, students now cover 48.8% of their education costs, compared to less than 30% in 1980 [3]. When state funding per student falls, public universities increase tuition to maintain their operations. Consequently, the correlation between rising tuition and rising federal aid is largely coincidental in the public sector: federal aid caps were raised to help families cope with tuition hikes that had already been triggered by state budget cuts [4].

Other Drivers: Administrative Cost Disease

Any comprehensive analysis of college tuition must also account for two non-aid factors: Baumol's cost disease and administrative expansion. Economist William J. Baumol argued that higher education, like performing arts and healthcare, is a labor-intensive industry that cannot easily automate its core services [7]. While manufacturing productivity has surged, a professor can still only teach a finite number of students per hour. To attract qualified talent, universities must increase salaries in line with the broader economy, even without corresponding productivity gains, resulting in structural price increases [7].

Furthermore, universities have expanded their non-instructional operations. Over the past three decades, the ratio of administrative and professional support staff to faculty has increased significantly. This growth is driven by a combination of federal compliance mandates (such as Title IX, financial aid reporting, and environmental safety regulations) and the expansion of student support services, including mental health counseling, career advising, and student life programming [4]. While these services add real value, they also increase the institutional overhead that must be funded through tuition.

Conclusion

The record shows that the Bennett Hypothesis is a powerful tool for explaining price inflation in private and for-profit institutions, where universities are highly responsive to market demand and readily capture federal credit expansions. The 60-cent subsidized loan pass-through identified by the New York Fed [1] and the 78% tuition premium in for-profit programs [2] are clear evidence of this capture.

However, applying the hypothesis as a blanket explanation for all higher education inflation mischaracterizes the reality of the public sector. For the 77% of students enrolled in public institutions, rising tuition is primarily a consequence of state budget cuts and enrollment growth that dilutes public funding per student. Policy solutions that focus exclusively on restricting federal student aid risk failing to lower tuition at public institutions, while shifting a larger financial burden onto low-income families who rely on federal grants and loans to access higher education.